Tornado Warning 111, NWS Houston/Galveston, TX

062 
WWUS54 KHGX 262228
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
528 PM CDT SAT AUG 26 2017

TXC185-201-339-473-477-262245-
/O.CON.KHGX.TO.W.0111.000000T0000Z-170826T2245Z/
Grimes TX-Washington TX-Montgomery TX-Waller TX-Harris TX-
528 PM CDT SAT AUG 26 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR SOUTHERN
GRIMES...NORTHEASTERN WASHINGTON...SOUTHWESTERN MONTGOMERY...
NORTHEASTERN WALLER AND NORTHWESTERN HARRIS COUNTIES...
    
At 524 PM CDT, a band of showers and thunderstorms, with embedded 
cells showing rotation capable of producing a tornado was located 
from about 6 miles west of Pinehurst to about 7 miles west of 
Tomball. Movement of individual cells within the band is northwest 
at 35 mph. 

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Tomball, Pinehurst, Magnolia, Stagecoach, Todd Mission, Cypress,
Plantersville, Dobbin and Dacus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3000 9557 2994 9571 3032 9614 3051 9578
TIME...MOT...LOC 2224Z 151DEG 31KT 3026 9583 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

090 
WWUS54 KHGX 262247
SVSHGX

Severe Weather Statement
National Weather Service Houston/Galveston TX
547 PM CDT SAT AUG 26 2017

TXC185-201-339-473-477-262256-
/O.EXP.KHGX.TO.W.0111.000000T0000Z-170826T2245Z/
Grimes TX-Washington TX-Montgomery TX-Waller TX-Harris TX-
547 PM CDT SAT AUG 26 2017

...THE TORNADO WARNING FOR SOUTHERN GRIMES...NORTHEASTERN
WASHINGTON...SOUTHWESTERN MONTGOMERY...NORTHEASTERN WALLER AND
NORTHWESTERN HARRIS COUNTIES HAS EXPIRED...
    
The tornadic thunderstorm which prompted the warning has weakened, 
but has the potential to restrengthen and will be watched closely. 
In the meantime, the warning has been allowed to expire.

A tornado watch remains in effect until 200 AM CDT for southeastern
Texas.

LAT...LON 3000 9557 2994 9571 3032 9614 3051 9578
TIME...MOT...LOC 2246Z 151DEG 31KT 3042 9593 

$$

Area Forecast Discussion
National Weather Service Houston/Galveston TX
454 PM CDT Sat Aug 26 2017

...Catastrophic and life-threatening flooding expected due to
prolonged heavy rainfall from Harvey...

.DISCUSSION...
With Harvey meandering just west of the forecast area, rain and
feeder bands will move over Southeast Texas until the storm moves
out of the area. Short term high resolution models show the
potential for rain bands to produce 10 to 15 inches of rain just
tonight and Sunday morning. Rainfall of 10 to 15 inches within 6
or 12 hours will produce flash flooding. In addition, rainfall
rates could exceed 4 inches per hour. If these intense rain bands
with these amounts occur over the metro areas, flooding could
impact homes, roadways, and the highway system.

In addition, isolated tornadoes will continue to be possible. A
tornado watch continues in effect through 2:00 AM Sunday.

With Harvey pretty much stuck in very weak upper level steering,
the potential for heavy rainfall will persist into Wednesday.
Global models continue to show the rainfall potential from tonight
through Wednesday evening of 15 to 25 inches. Isolated maximum
amounts of up to 40 inches for the entire event is possible.

It should be stressed that anyone planning to travel should check
with TXDOT, Houston TranStar, or other trusted sources for road
conditions prior to travel. Rainfall of this magnitude could cause
major flooding of the highway system.

40

&&

.HYDROLOGY...
Widespread addition rainfall of 15 to 25 inches with storm totals
of 40 inches would cause river flooding categories of widespread
Moderate flooding. Many areas would experience Major and Record
flooding. Individual river forecasts as of 4:00 PM include:

* Lavaca-Navidad: Widespread Major river flooding
* Colorado: Major river flooding below the Colorado River at La
  Grange
* Tres Palacios: Moderate flooding now and Major flooding
  forecast
* San Bernard: Major with Record river flooding likely
* Brazos:
  - Minor flooding upstream of Hempstead
  - Moderate flooding at San Felipe
  - Major flooding from Richmond downstream
* San Jacinto River: Moderate to Major flooding
* Houston Bayous: Moderate to Major flooding (will be critical
  depending on intensity and rainfall amounts)
* Trinity River: Moderate at Liberty and possible Minor at Moss
  Bluff

KLG

&&

.CLIMATE...
Several rainfall records have been set as of 4:00 PM today. Note
that additional rainfall is possible through midnight. Here a list
of the new records:

Site               Rainfall              Old Record

College Station    2.80 inches           1.38 set in 1959
Galveston          4.01 inches           2.06 set in 1953
City of Houston    3.83 inches           1.66 set in 1959

Note that Houston Hobby Airport received 2.82 inches as of 4:00 PM
CDT. The record rainfall for August 26th at Hobby is 3.33 inches
set in 1959.

40

&&

.MARINE...
Sustained winds/seas have decreased across our bays/coastal waters
in response to Harvey moving inland into south central Texas over-
night. Gusts up to 35kts (higher around Matagorda Bay) will remain
possible tonight. Progs are continuing to track Harvey back toward
the coast tomorrow through Monday, but there is still a lot of un-
certainty with timing. Will keep with the previous forecast trends
of increasing wind threats across the coastal waters Mon into Tue.
Elevated tides/seas will continue to be a problem through at least
Tuesday.

Extreme to strong rip currents will continue for a few more days.
Currents and river(s) discharge(s) into the bays will also remain
problematic for navigation for at least a few days (possibly into
next weekend) given the expected record setting rainfall the next
few days and the major to extreme flooding that will follow. 41

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      73  79  71  81  70 / 100  80  80  70  60
Houston (IAH)              75  80  73  79  72 / 100  80  80  80  70
Galveston (GLS)            77  84  76  82  77 /  90  80  80  80  70

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...Tropical Storm Warning for the following zones: Austin...
     Brazoria...Chambers...Colorado...Fort Bend...Galveston...
     Harris...Jackson...Liberty...Matagorda...Waller...Wharton.

     Flash Flood Watch through Wednesday evening for the following
     zones: Austin...Brazoria...Brazos...Burleson...Chambers...
     Colorado...Fort Bend...Galveston...Grimes...Harris...
     Houston...Jackson...Liberty...Madison...Matagorda...
     Montgomery...Polk...San Jacinto...Trinity...Walker...
     Waller...Washington...Wharton.

GM...Tropical Storm Warning for the following zones: Coastal waters
     from Freeport to the Matagorda Ship Channel out 20 NM...
     Coastal waters from High Island to Freeport out 20 NM...
     Galveston Bay...Matagorda Bay...Waters from Freeport to the
     Matagorda Ship Channel from 20 to 60 NM...Waters from High
     Island to Freeport from 20 to 60 NM.

&&

Discussion...40
Aviation/Marine...39

Hazardous Weather Outlook
National Weather Service Houston/Galveston TX
741 AM CDT Sat Aug 26 2017

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-271100-
Austin-Brazoria-Brazos-Burleson-Chambers-
Coastal waters from Freeport to the Matagorda Ship Channel out
20 NM-Coastal waters from High Island to Freeport out 20 NM-
Colorado-Fort Bend-Galveston-Galveston Bay-Grimes-Harris-Houston-
Jackson-Liberty-Madison-Matagorda-Matagorda Bay-Montgomery-Polk-
San Jacinto-Trinity-Walker-Waller-Washington-
Waters from Freeport to the Matagorda Ship Channel from 20 to
60 NM-Waters from High Island to Freeport from 20 to 60 NM-
Wharton-
741 AM CDT Sat Aug 26 2017

This hazardous weather outlook is for portions of Southeast Texas.

.DAY ONE...Today and Tonight

Rainbands from Harvey will produce gusty winds, locally heavy rainfall
and associated flooding, and isolated tornadoes. Flooding will occur
as rainfall totals could approach or exceed 10 to 15 inches.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Harvey is expected to meander in and around the Southeast Texas area
for several days and produce round after round of showers and thunderstorms.
Rainfall totals (including today's and tonight's 10 to 15 inches) will
be adding up with event amounts of 15 to 30 inches expected and isolated
maximum totals of 40 inches possible. The greatest threat area is expected
to be generally along and south of a line from Brenham to Conroe to
High Island. Rainfall of this magnitude will cause catastrophic and
life-threatening flooding.

.SPOTTER INFORMATION STATEMENT...
Spotters will be needed over the weekend and through at least the
first half of the week.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
219 PM CDT SAT AUG 26 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0345 PM     TORNADO          10 S BAY CITY           28.83N  95.96W
08/25/2017                   MATAGORDA          TX   BROADCAST MEDIA

            SHED AND FENCE DAMAGE REPORTED FROM A TORNADO IN
            SARGENT

0900 PM     FLOOD            4 N BONNEY              29.35N  95.47W
08/25/2017                   BRAZORIA           TX   LAW ENFORCEMENT

            FLOODED ROADWAYS FM 655 AND FM 521 IN ROSHARON... TIME
            OF EVENT ESTIMATED.

0900 PM     FLOOD            7 NNE OYSTER CREEK      29.09N  95.28W
08/25/2017                   BRAZORIA           TX   LAW ENFORCEMENT

            DEMIJOHN CR 227 REPORTED IMPASSIBLE.

1117 PM     TORNADO          2 E ANGLETON            29.17N  95.39W
08/25/2017                   BRAZORIA           TX   LAW ENFORCEMENT

            BRAZORIA COUNTY LAW ENFORCEMENT POSSIBLE TORNADO
            DAMAGE... HOUSE OFF FOUNDATION COUNTY RD. 210 AND FM
            523. TIME GIVEN WAS 1117 PM BUT STILL NEED TO VERIFY
            WITH RADAR. TIME DID NOT MATCH.

0227 AM     TORNADO          6 NNW PECAN GROVE       29.70N  95.78W
08/26/2017                   FORT BEND          TX   BROADCAST MEDIA

            ROOF DAMAGE REPORTED TO A HOME NEAR WESTPARK TOLLWAY
            AND THE GRAND PARKWAY

0230 AM     TORNADO          3 S MANVEL              29.44N  95.36W
08/26/2017                   BRAZORIA           TX   EMERGENCY MNGR

            REPORT CAME IN FROM THE MANVEL EOC REGARDING DAMAGED
            VEHICLES AND BUILDING DAMAGE. POSSIBLY OCCURED BETWEEN
            215-245 AM NO COUPLET SEEN ON HGX NOR HOU RADAR DURING
            THAT TIME.

0744 AM     TORNADO          4 SE HUMBLE             29.95N  95.23W
08/26/2017                   HARRIS             TX   BROADCAST MEDIA

            BROADCAST MEDIA REPORTING TORNADO TOUCHDOWN RESULTING
            IN ROOF... TREE... AND FENCE DAMAGE IN LAKESHORE
            SUBDIVISION

0805 AM     TORNADO          8 S COLLEGE STATION     30.48N  96.32W
08/26/2017                   BRAZOS             TX   BROADCAST MEDIA

            TREE DAMAGE REPORTED NEAR OLYMPIA BUDDY ROAD

0908 AM     FLASH FLOOD      3 WNW WOODLOCH          30.24N  95.46W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSIBLE AT 45 NB FDR AND HIGHWAY 242. HIGH
            WATER OVER THE RIGHT LANE ONTO 45 NB FDR.

0949 AM     FLASH FLOOD      1 WNW WILLIS            30.43N  95.49W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSABLE AT 45 NB FDR AND LINCOLN RIDGE WITH 12
            INCHES OF WATER. BARRICADE REQUIRED AT MLK.

1024 AM     FLASH FLOOD      2 ESE PORTER HEIGHTS    30.14N  95.29W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            RAOD IMPASSABLE AT HORSESHOE CIR AND PAINTED BLVD WITH
            4-6 INCHES OF WATER.

1040 AM     FLASH FLOOD      2 NNW SHENANDOAH        30.21N  95.47W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSABLE AT 11000 BLK RIVER OAKS DR WITH AT
            LEAST 2 FEET OF WATER.

1043 AM     FLASH FLOOD      1 W WILLIS              30.43N  95.49W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            IMPASSABLE ROAD AT 45 NB FEDER JNO HINES RD. BARRICADES
            HAVE BEEN SET UP.

1059 AM     FLASH FLOOD      SHENANDOAH              30.18N  95.45W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSABLE AT 19000 BLK DAVID MEMORIAL FROM SAMS
            CLUB TO SHANANDOAH PARK

1140 AM     FLASH FLOOD      1 E HUNTSVILLE          30.71N  95.53W
08/26/2017                   WALKER             TX   BROADCAST MEDIA

            ROAD CLOSED AT BOWERS ROAD AND BEARKAT BLVD

1140 AM     FLASH FLOOD      1 E NEW WAVERLY         30.54N  95.46W
08/26/2017                   WALKER             TX   BROADCAST MEDIA

            ROAD CLOSED DUE TO FLASH FLOODING AT FM 150 AND PODRAZA
            ROAD

1140 AM     FLASH FLOOD      9 SSW HUNTSVILLE        30.61N  95.63W
08/26/2017                   WALKER             TX   BROADCAST MEDIA

            ROAD CLOSED DUE TO FLASH FLOODING AT FM 1374 AND COTTON
            ROAD

1158 AM     FLASH FLOOD      2 W SHOREACRES          29.62N  95.03W
08/26/2017                   HARRIS             TX   COUNTY OFFICIAL

            WATER OVER FIRE HYDRANTS SHOREACRES AT TAYLORS BAYOU

&&

EVENT NUMBER HGX1700341
EVENT NUMBER HGX1700342
EVENT NUMBER HGX1700343
EVENT NUMBER HGX1700344
EVENT NUMBER HGX1700345
EVENT NUMBER HGX1700346
EVENT NUMBER HGX1700347
EVENT NUMBER HGX1700348
EVENT NUMBER HGX1700349
EVENT NUMBER HGX1700350
EVENT NUMBER HGX1700351
EVENT NUMBER HGX1700352
EVENT NUMBER HGX1700353
EVENT NUMBER HGX1700354
EVENT NUMBER HGX1700355
EVENT NUMBER HGX1700356
EVENT NUMBER HGX1700357
EVENT NUMBER HGX1700358

DO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
243 PM CDT SAT AUG 26 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0218 PM     WATER SPOUT      10 ENE GALVESTON        29.30N  94.76W
08/25/2017                   GMZ355             TX   PUBLIC

            WATERSPOUT SEEN FROM EAST END NEAR SEAWALL AND SECOND
            STREET

&&

EVENT NUMBER HGX1700359

MH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
254 PM CDT SAT AUG 26 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0244 PM     FLASH FLOOD      5 SE ONALASKA           30.77N  95.04W
08/26/2017                   POLK               TX   DEPT OF HIGHWAYS

            HIGH WATER ON FM 3126 AND FM 356

&&

EVENT NUMBER HGX1700360

47

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
419 PM CDT SAT AUG 26 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0408 PM     TORNADO          10 WNW JERSEY VILLAGE   29.95N  95.73W
08/26/2017                   HARRIS             TX   STORM CHASER

            TREES BLOWN OVER AND MINOR ROOF DAMAGE REPORTED NEAR
            BARKER CYPRESS AND TUCKERTON

&&

EVENT NUMBER HGX1700361

MH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
441 PM CDT SAT AUG 26 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0423 PM     TORNADO          7 WNW JERSEY VILLAGE    29.91N  95.69W
08/26/2017                   HARRIS             TX   PUBLIC

            TORNADO CONFIRMED VIA SOCIAL MEDIA

&&

EVENT NUMBER HGX1700362

DO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
449 PM CDT SAT AUG 26 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0427 PM     TORNADO          8 NW JERSEY VILLAGE     29.95N  95.67W
08/26/2017                   HARRIS             TX   LAW ENFORCEMENT

            ANOTHER TORNADO CONFIRMED ON THE GROUND IN THE VICINITY
            OF HIGHWAY 290 AND BARKER CYPRESS

&&

EVENT NUMBER HGX1700363

47